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Tony,
Linn recommend STP because... and sit down before you
read
on... Knekt doesn't actually use the pairs for balancing.... Instead it
uses any
old cables in the bundle!
Linn uses pins 2&3 and 6&7 as the balanced
audio
signals, standard CAT5 pairs are 1&2, 3&6, 4&5,
7&8.
Argghhhhh!!!! Why???????
-----Original Message-----
From: BUTLER, Tony, FM [mailto:tony.butler@xxxxxxx]
Sent: Fri 31/05/2002 13:33
To: 'ukha_d@xxxxxxx'
Cc:
Subject: RE: [ukha_d] RE: cat5 cable picking up
radio ?
Okay
thanks. I had assumed (before I knew ethernet was balanced) that it
was
for data purposes in electrically noisy environments, so I was confused
then
when it turned out ethernet was balanced after
alll.....
Musical Images tried to make me go for STP when I bought the Linn
stuff
off them.
I
told them where to go and put in my own UTP at a greatly reduced price.
:D
Speaking of which, where can I get a roll of cheap CAT5 - it was 60
quid a roll last time I bought, but I've heard 25/30 quid bandied about
here a
few times.
I
will shortly have some work done on the house that will mean no more
opportunity to fit CAT5 without having to redecorate too and I'm worried
that
though I have more than I need now, that I have still under estimated
future
needs - especially when the KAT5 switcher materialises
:)
Am
going to throw in a few more runs before it's too late!
cheers,
Tony
Well - there are a few applications which use the 8 cores separately
rather than as 4 balanced pairs. STP might come in useful there.
Also, it's useful in factory / industrial environments. If you want
cable to go anywhere near a blast-furnace, say.
I've never seen an application that called for it in a
domestic / office environment.
M.
-----Original Message-----
From: BUTLER,
Tony, FM [mailto:tony.butler@xxxxxxx]
Sent: Fri 31/05/2002
12:58
To: 'ukha_d@xxxxxxx'
Cc:
Subject: RE: [ukha_d] RE: cat5 cable picking up radio
?
Mark,
If CAT5 is designed for balanced signals, which are (relatively)
immune to interference, what then is the point of screened
CAT5?
It's a question I've been meaning to ask for a while (following a
previous discussion about ethernet being balanced) and you've just
reminded me of it.
Any ideas?
Tony
You CAN, if you really feel like it, wrap the CAT5 cable in kitchen
foil, and ground one end, which will help a bit...
... But it's fundamentally a crap way to do it. If you're going to
carry signals over CAT5, then they need to be balanced. The whole point
of balancing is in the rejection of interference (such as shortwave
radio.)
Doesn't matter whether you're talking 10baseT ethernet, 100baseT
ethernet, or KAT5 audio... balancing is the only way to go.
M.
-----Original Message-----
From: Amar
Nagi [mailto:amar@xxxxxxx]
Sent: Fri 31/05/2002 12:37
To: ukha_d@xxxxxxx
Cc:
Subject: cat5 cable picking up radio ?
I lay as a temporary solution a cat5 cable and i run audio
down
it to the a set of mulitmedia pc speakers in the bedroom.
and for some reason it picks up radio. I can hear
a radio program in the audio.
any ideas ?
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